Reference : Taxa distribution and RAPD markers indicate different origin and regional differentia...
Scientific journals : Article
Life sciences : Environmental sciences & ecology
Taxa distribution and RAPD markers indicate different origin and regional differentiation of hybrids in the invasive Fallopia complex in central-western Europe
Krebs, C. mailto [University Marburg > > > >]
Mahy, Grégory mailto [Université de Liège - ULiège > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech >]
Matthies, D. [ > > ]
Schaffner, U. [ > > ]
Tiébré, M.-S. [ > > ]
Bizoux, Jean-Philippe mailto [Université de Liège - ULiège > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech >]
Plant Biology
Georg Thieme Verlag Stuttgart
Yes (verified by ORBi)
[en] Fallopia ; hybridization ; genetic structure
[en] Interspecific hybridization can be a driving force for evolutionary processes during plant invasions, by increasing genetic variation and creating novel gene combinations, thereby promoting genetic differentiation among populations of invasive species in the introduced range. We examined regional genetic structure in the invasive Fallopia complex, consisting of F. japonica var. japonica, F. sachalinensis and their hybrid F. × bohemica, in seven regions in Germany and Switzerland using RAPD analysis and flow cytometry. All individuals identified as F. japonica var. japonica had the same RAPD phenotype, while F. sachalinensis (11 RAPD phenotypes for 11 sampled individuals) and F. × bohemica (24 RAPD phenotypes for 32 sampled individuals) showed high genotypic diversity. Bayesian cluster analysis revealed three distinct genetic clusters. The majority of F. × bohemica individuals were assigned to a unique genetic cluster that differed from those of the parental species, while the other F. × bohemica individuals had different degrees of admixture to the three genetic clusters. At the regional scale, the occurrence of male-fertile F. sachalinensis coincided with the distribution of F. × bohemica plants showing a high percentage of assignment to both parental species, suggesting that they originated from hybridization between the parental species. In contrast, in regions where male-fertile F. sachalinensis were absent, F. × bohemica belonged to the non-admixed genetic group, indicating multiple introductions of hybrids or sexual reproduction among hybrids. We also found regional differentiation in the gene pool of F. × bohemica, with individuals within the same region more similar to each other than to individuals from different regions.
Deutsche Bundesstiftung Umwelt (DBU)
Researchers ; Professionals

File(s) associated to this reference

Fulltext file(s):

Open access
krebs et al. 2009.docAuthor postprint1.16 MBView/Open

Bookmark and Share SFX Query

All documents in ORBi are protected by a user license.